evolutionary clock


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evolutionary clock

any means of estimating the time which has elapsed since the evolution of a form or structure. For example, DNA or protein sequences may have two different forms and the rate of change indicated by such sequences may be directly proportional to the elapsed time. Calibration of such ‘clocks’ may be made through comparison with the fossil record.
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In these cases it has been possible to establish an evolutionary clock that has given some surprising results.
The problem today is to solve the riddle of reading the molecular evolutionary clock.
It's like an evolutionary clock ticking between rock, paper, scissors then back to rock," he said.
Mitochondrial DNA alterations may not tick away like hands on a reasonably accurate evolutionary clock, Howell maintains.
Continental drift and the use of albumins as an evolutionary clock.
On the one hand, we have invoked evolutionary history and an evolutionary clock (Kane and Culver 1991; Kane et al.
A potential solution is to use an argument based on an evolutionary clock and assume that the probability of a switch in a branch of a tree depends on the length of the branch.

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